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AA <br /> MW Sorter <br /> SGS Minerals Sample ID: 072-102224-005 <br /> As Received <br /> %Moisture.Total 1105-C} 5.74 <br /> Tests Result Unit Method <br /> Trace Analysis Basis Dry 3 Acid Digest/ICP-MS <br /> Antimony 6 ug/g 3 Acid DigesVlCP-MS <br /> Barium 912 ug/g 3 Acid DigesVlCP-MS <br /> Beryllium 2.6 ugig 3 Acid DigesVlCP-MS <br /> Cadmium 74 ug'g 3 Acid DigesVlCP-MS <br /> Cobalt 23 ugg 3 Acid Digest'tCP-MS <br /> Chromium 26 ug/g 3 Acid DigesVlCP-MS <br /> Copper 1242 ug/g 3 Acid DigesVlCP-MS <br /> Lithium 11 ugig 3 Acid DigesVlCP-MS <br /> Manganese 1052 ug/g 3 Acid DigesVlCP-MS <br /> Molybdenum 11 ug/g 3 Acid DigesVlCP-MS <br /> Nickel 14 ug/g 3 Acid DigesVlCP-MS <br /> Lead 5960 ug/g 3 Acid DigesVlCP <br /> Sodium 0.26 % 3 Acid DigesVlCP <br /> Strontium 91 ugig 3 Acid DigesVlCP-MS <br /> Thallium <2 ug/g 3 Acid DigesVlCP-MS <br /> Thorium 6 ug/g 3 Acid DigesVlCP-MS <br /> Tin 4 ug/g 3 Acid DigesVlCP-MS <br /> Vanadium 51 u(j/g 3 Acid DigesVlCP-MS <br /> Zinc 8886 ug/g 3 Acid DigesVlCP-MS <br /> Zirconium 59 ugig 3 Acid DigesVlCP-MS <br /> Calcium 1-90 % 3 Acid DigesVlCP <br /> Magnesium 1.20 % 3 Acid DigesVlCP <br /> Phosphorus 0.06 % 3 Acid DigesVlCP <br /> AMU -) <br /> QtQ; Anthony Grimaldi, Branch Manager <br /> SOS Norte+America Ix Wwats Serwces Uws.on f. <br /> 4665 Pans Si Scete 9-200 Oenve. CC) 8023Q 1 13031 313-4772 t 13031 373-4791 www.sgs.corr <br /> None of the samples exhibited substantial potential to produce toxicity or acidity.As further confirmation <br /> of the geochemical characteristics of the material,the waste rock has been positioned above the London <br /> Water Tunnel for decades, and produces a neutral drainage around pH 7.8 containing zinc and other <br /> contaminants at non-toxic concentrations. <br /> The drainage from the South London Stockpile is not toxic, or acidic. Rather the flow of water entering <br /> the workings around the American Shaft is causing leaching of zinc to occur within the Mine workings. <br /> Removal of the waste from the American parcel, and diversion of water away from the Shaft area, will <br /> reduce the flow of water to the Water Raise and reduce loading in the Water Tunnel. <br /> Note that hardness and alkalinity is very high in quarterly monitoring results indicating the very high <br /> natural background calcium carbonate dissolving from the Leadville Formation throughout the area. <br /> DRMS(Item#278): Please ensure the application addresses all sections of Rule 6.4.21(14)for the stockpiled <br /> ore to be processed by the operation and the waste material(mineralized fines from crushing/screening and <br /> sorted barren material)that will need to be disposed of on-site. <br /> MW Sorter(Item#278 Response): Waste rock will be processed as previously discussed. <br /> 111Pag <br />